2. Being fat and thin is not a criterion for judging knowledge and ability. Many professors are fat, so they are not professors. The national team also has many fat coaches.
3. There are coaches messing around. The threshold is too low. People can make money, and some people recognize it. Why bother?
4. The standard of gym is not high. If you spend money, you will get a license. If you are a person, who cares about your figure and ability?